BT
Bertha Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Midland-County, Michigan
Our Model Tree links this Bertha Thomas across the 1930 and 1940 US Censuses in Midland-County, Michigan (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 9-person household.
Age 10
b. ~1930
Female
Daughter
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Midland-County, Michigan |
| Surname | Thomas |
| Given Name | Bertha |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Hope Twp |
| 1935 Residence (County) | Midland |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Hope Twp |
| Est. Birth Year | ~1930 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Bertha | Age | Birth yr |
|---|---|---|---|---|
| Arthur Thomas | Head | — | 36 | ~1904 |
| Marian Thomas | Son | — | 5 | ~1935 |
| Della Thomas | Daughter | — | 3 | ~1937 |
| Arthela Thomas | Daughter | — | 1 | ~1939 |
| Bertha Thomas | Daughter | — | 10 | ~1930 |
| Inez Thomas | Daughter | — | 7 | ~1933 |
| Ella Thomas | Daughter | — | 3 | ~1937 |
| Bessie Thomas | Spouse | — | 30 | ~1910 |
| Roberta Thomas | Daughter | — | 8 | ~1932 |
Census Appearances
1930
Midland, Michigan
Daughter, age 1
Midland, Michigan · implied b. ~1929 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Bertha |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Occupation | none |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Midland-County, Michigan
Daughter, age 10
Midland-County, Michigan · implied b. ~1930 — 9 household members
| Surname | Thomas |
| Given Name | Bertha |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Hope Twp |
| 1935 Residence (County) | Midland |
| Highest Grade | 4 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Bertha Thomas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Bertha Thomas
Daughter · 1940 · age 10 · b. ~1930 · Michigan
★ You are viewing this record
Sibling
Inez Thomas
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marian Thomas
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arthela Thomas
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Della Thomas
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ella Thomas
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roberta Thomas
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Midland-County, Michigan
Open full size
1940 US Federal Census — Midland-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01790-00135)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Hylan Torgon | 18 | daughter | Maid | Ohio |
| 2 | Son Lester | 8 | son | — | Michigan |
| 3 | Joseph Williams | 52 | head | Farming | Indiana |
| 4 | Sarah Williams | 43 | wife | — | Ohio |
| 5 | Woodrow Williams | 21 | son | Farm Laborer | Michigan |
| 6 | Harold Williams | 20 | son | Farm Laborer | Michigan |
| 7 | Warren Williams | 18 | son | Farm Laborer | Michigan |
| 8 | Earl Williams | 17 | son | Farm Laborer | Michigan |
| 9 | Clarence Williams | 15 | son | — | Michigan |
| 10 | Claude Williams | 12 | son | — | Michigan |
| 11 | Dale Williams | 10 | son | — | Michigan |
| 12 | Ray Williams | 4 | son | — | Michigan |
| 13 | Mildred Williams | 19 | daughter | — | Michigan |
| 14 | Ree Williams | 10 | daughter | — | Michigan |
| 15 | Perry Rosher | 36 | head | Truck Driver | Michigan |
| 16 | Gladys Rosher | 36 | wife | — | Michigan |
| 17 | Norma Rosher | 13 | daughter | — | Michigan |
| 18 | Eldon Rosher | 11 | son | — | Michigan |
| 19 | Melvin Rosher | 5 | son | — | Michigan |
| 20 | Arthur Thomas | 36 | head | Farming | Michigan |
| 21 | Bessie Thomas | 30 | wife | — | Michigan |
| 22 | Bertha Thomas THIS PERSON | 10 | daughter | — | Michigan |
| 23 | Roberta Thomas | 8 | daughter | — | Michigan |
| 24 | Inez Thomas | 7 | daughter | — | Michigan |
| 25 | Marian Thomas | 5 | son | — | Michigan |
| 26 | Della Thomas | 3 | daughter | — | Michigan |
| 27 | Ella Thomas | 3 | daughter | — | Michigan |
| 28 | Arthela Thomas | 1 | daughter | — | Michigan |
| 29 | Marion Thomas | 67 | head | Farming | Ohio |
| 30 | Carrie Thomas | 62 | wife | — | Michigan |
| 31 | Alvie Thomas | 30 | son | Farm Laborer | Michigan |
| 32 | Nelson Thomas | 19 | son | Farm Laborer | Michigan |
| 33 | Ace Carrigan | 42 | head | Farming | Michigan |
| 34 | Alice Carrigan | 39 | wife | — | Michigan |
| 35 | Irene Carrigan | 16 | daughter | — | Michigan |
| 36 | Aletha Carrigan | 13 | daughter | — | Michigan |
| 37 | Eleanor Carrigan | 7 | daughter | — | Michigan |
| 38 | Shirley Carrigan | 4 | daughter | — | Michigan |
| 39 | James Gersau | 34 | head | Laborer | Michigan |
| 40 | Doris Gersau | 31 | wife | — | Michigan |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)